1. Interaction of physico-mechanical and physico-chemical properties of polymer materials / G.G. Aliyev and F.B. Nagiyev -- 2. Stress-strain state of a sandwich thick-walled pipe with regard to change of physico-chemical properties of the material / G.G. Aliyev and F.B. Nagiyev -- 3. Stress, deformation, and strength of sandwich reinforced thick-walled pipes with regard to change of physico-chemical properties of binder / G.G. Aliyev and F.B. Nagiyev.